Open Access2-D modelling of effect of free-stream turbulence on trailing edge vortex
Author(s) -
Syaiful Syaiful,
Anggie Restue Saputra,
Nazaruddin Sinaga,
Bambang Yunianti
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/909/1/012039
Subject(s) - airfoil , turbulence , stall (fluid mechanics) , mechanics , physics , vortex , turbulence kinetic energy , starting vortex , trailing edge , reynolds number , vorticity , angle of attack , horseshoe vortex , leading edge , aerodynamics , vortex ring
Vorticity causes many adverse effects on the area near the surface, both on moving (turbine blade) and fixed objects. Therefore, this study attempts to investigate the effects of free-stream turbulence on trailing edge vortex on the NACA 0015 airfoil profile. This research was conducted using two-dimensional numerical simulations. To determine the interaction of vortex and free stream turbulence, two variations of turbulent intensity were given, namely 0.5% and 4.6% with Reynolds number of 1.6 x 10 5 . The k-ε turbulence model was used in the current study. The angle of attack of the flow towards the airfoil was varied from 0° to 25° in conditions of increase and decrease in the horizontal position of the airfoil. The result was found that there is an agreement between the simulation and the experiment result. Increased turbulent intensity can delay the stall condition, the stall process begins to be observed after the 12° attack angle at 0.5% turbulent intensity while at turbulent intensity 4.6% the stall process was found after the 15° attack angle. From a velocity streamline, it was found that an increase in turbulent intensity can inhibit vortex growth.